Using a 10W 2.1 Amp charger my phone will not charge past 89%. Using a 1.5 amp charger it also won't charge past 89%. Using a car charger or the travel charger included with the phone will take it to 100%. Any ideas? The only thing I can think of is the length of the USB cable. I know somebody did an evaluation for the N10 or N7 on the quality of the charge as you go to a longer USB cable. When it only gets to 89% I am using a 5' cable. Do you think that would be the issue? I plan on running a test tonight once my phone needs to be recharged but I thought I'd post in the meantime. If this phone can't fully charge with a 5' cable that will be very inconvenient.